<!DOCTYPE html>
<html lang="" style="width: 100%; height: 100%; margin: 0; padding: 0">
  <head>
    <title>devtools</title>
    <script defer src="devtools.js"></script>
  </head>
  <body style="width: 100%; height: 100%; margin: 0; padding: 0; overflow: hidden">
    devtools
    <button id="send2bg">send to background</button>
    <div id="text"></div>
    <img src="https://fanyi-cdn.cdn.bcebos.com/static/cat/asset/logo.2481f256.png" /> 
  </body>
</html>
